CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yong Huang,Lida Xu,Qibin Zhuang,Xiong Zhou,Zhenjin Xu,Wei Xiao,Xin Liu,Qinnan Chen,Yang Zhao,Chao Wu,Daoheng Sun,Dezhi Wu
High-temperature heat flux sensors play a pivotal role in detecting the dynamic heat exchange processes of heating and cooling, in high-temperature environments. However, the detection of surface heat flux on curved parts operating at high temperatures remains a formidable challenge. Flexible thin-film heat flux sensors, while offering benefits such as conformal adhesion and excellent portability, are typically limited by low operational temperatures and narrow measurement ranges. This work proposes a high-temperature flexible heat flux sensor based on multi-layered high-temperature resistant ceramics nanofibre membranes that one layer worked as a substrate and the other two work as thermal resistance layers, and direct ink writing platinum sensitive elements with Wheatstone Bridge configuration. The prototype sensor is capable of quantifying heat flux reaching 1330 kW/m 2 and withstands temperature as high as 1200 °C. The sensor is bendable with resistance change only about 0.5 % even when the bending radius was larger than 10 mm. These extraordinary characteristics indicate that such methodology will offer a new way for the development of high-temperature thin-film flexible heat flux sensors, demonstrating considerable potential for applications in high-temperature environments.
研究领域:
传感器技术
·
材料科学
·
热物理学
·
仪器仪表工程
·
高温测量技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·Vol. 47
·期 21
·30039-30042
·
IF 4.527
Leihao Feng,Qiwei Hu,Li Lei,Lei Qi,Leilei Zhang,Meifang Pu,Zili kou,Fang Peng,Duanwei He,Yohei Kojima,Hiroaki Ohfuji,Tetsuo Irifune
High-hardness TaN compacts with a diameter and height of 6 mm were synthesized through the phase transformation of CoSn-type into WC-type TaN under experimental conditions of high temperature and high pressure . The Vickers hardness of WC-type TaN compacts obtained at the pressure of 5 GPa and the temperature of 1873 K is found to be ~21.5 ± 1.5 GPa with a load of 3 Kg, which is comparable to that of the pure tungsten carbide compact (~20 GPa) and higher than those of ultrahigh temperature ceramics ZrB 2 and HfB 2 under the same load. The high hardness of WC-type TaN compacts presented in this work is attributed to the deviatoric strain and well-bonded nanograins . The synthesized WC-type TaN compacts also possess a high oxidation temperature (1072 K). These results suggest that the WC-type TaN with high hardness and high thermal stability holds great promise for industrial applications.
研究领域:
材料科学
·
无机非金属材料
·
超硬材料
·
高温材料
·
固态化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Yan Zhao,Yang Gao
The microstructure of plasma-sprayed nanostructured yttria-stabilized zirconia (YSZ) coatings may change during high-temperature exposure, which would influence the coating performance and service lifetime. In this study, the phase structure and the microstructural evolution of 3YSZ (zirconia-3 mol% yttria) and 5YSZ (zirconia-5 mol% yttria) nanostructured coatings were investigated by means of sintering at 1400 °C for 50–100 h. The microhardness, elastic moduli, and thermal shock cycles of the 3YSZ and 5YSZ nanostructured coatings were also investigated. The results showed that the redistribution of yttrium ions at 1400 °C caused the continuous increase of monoclinic-phase zirconia, but no obvious inter-splat cracking formed at the cross-sections, even after 100 h. Large voids appeared around the nanoporous zone because of the sintering of nanoscale granules upon high-temperature exposure. The microhardness and elastic moduli of the nanostructured coatings first increased and then decreased with increasing sintering times. The growth rate of the nanograins in the 3YSZ coating was lower than that in 5YSZ, which slowed the changes in 3YSZ coating porosity during sintering. Although the 3YSZ coating was prone to monoclinic phase transition, the experimental results showed that the thermal shock resistance of the 3YSZ coating was better than that of the 5YSZ coating.
研究领域:
材料科学
·
表面工程
·
陶瓷涂层
·
热障涂层
·
高温材料
✓ 已验证
DOI
高影响因子
Results in Physics
·
2017
·
IF 0.946
Haihua Chen,Hao Liang,Lingxiao Liu,Huishan Li,Kui Liu,Fang Peng
The Vickers hardness of the bulk TaB and nano-TaC ceramics sintered at high pressure and high temperature were measured by using a diamond indentation method. Our tests gave a maximum Vickers hardness of 13.9 GPa for TaB, and 19.2 GPa for nano-TaC ceramics under a load of 29.4 N. The hardness of nano-TaC-5 wt% Co composites was also measured under the same load for comparison, which was found to be much lower than that of TaB and nano-TaC. The relative densities calculated by the Archimedes method are 13.5 g/cm 3 for TaB and 13.6 g/cm 3 for nano-TaC. The averaged fracture toughness is 6.8 ± 0.3 MPa m 1/2 for TaB and 5.0 ± 0.2 MPa m 1/2 for nano-TaC. Our results show that the hardness of the TaB may not be as high as previous reports.
研究领域:
材料科学
·
陶瓷学
·
凝聚态物理
·
高温材料
·
超硬材料
✓ 已验证
DOI
高影响因子
CORROSION SCIENCE
·
2022
·
IF 7.72
Tianquan Liang,Zhihua Huang,Menghao Li,Wantong Xiao,Huan He,Aoping He,Xiyong Chen,Nengneng Luo
The thermochemical reaction behaviors between Y 2 O 3 and calcium-magnesium-aluminosilicate (CMAS) at 1250 °C∼1400 °C were investigated. A continuous-dense reaction layer mainly composed of Y-apatite phase quickly forms within 15 min, and its slow increasing thickness depends on the molten CMAS infiltration along the Y-apatite grain boundaries, the dissolution of the Y-apatite phase into the melt, the inhibiting effect on the CMAS penetration, and the reaction time and temperature. The CMAS crystallization occurs due to the change of chemical composition and the formation of other reaction products. The dense reaction layer shows good resistance to the molten CMAS infiltration.
研究领域:
材料科学
·
无机非金属材料
·
高温材料
·
陶瓷涂层
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·Vol. 49
·期 3
·4863-4871
·
IF 5.532
Kai Su,Xuekun Tian,Zhenzhen Li,Xinhong Liu
Biochar was proposed as a novel carbon source for synthesizing Ti 3 SiC 2 powder with high purity by a simple pressureless sintering at 1673 K, and Ti 3 SiC 2 grains exhibited the typical nanolayered structure. The oxidation behavior of Ti 3 SiC 2 powder showed the parabolic law during isothermal oxidation from 1273 K to 1473 K. Dense and continuous oxidation layer consisting of mixed TiO 2 and SiO 2 was formed rapidly on the surface of Ti 3 SiC 2 particles as a diffusion barrier , which effectively retarded the inward diffusion of oxygen, conferring good oxidation resistance of the powder.
研究领域:
材料科学
·
无机非金属材料
·
高温材料
·
复合材料
·
材料化学
·
固体化学
·
功能材料
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·Vol. 50
·期 5
·7346-7354
·
IF 5.2
Songtong Xuan,Xiangchen Kong,Jianying Hao,Xiaojun Wang,Yuming Tian
MgO–MgAl 2 O 4 composites are arising as promising candidates for high-temperature industrial applications. For this reason, the in-situ synthesis of such types of composites with spinel structure has attracted the attention of the scientific community. Along these lines, in this work, magnesia and bauxite were used as raw materials to fabricate MgAl 2 O 4 composites. The mass proportion in the composites was also adjusted by using the solid-phase sintering method at 1400–1650 °C to enhance its mechanical properties and densification. XPS and SEM measurements were conducted, indicating that the MA50 sample with the mass ratio of 50:100 (MgAl 2 O 4 :MgO + MgAl 2 O 4 ) exhibited the best properties at 1550 °C, in terms of uniformity of the grains’ growth morphology, optimal densification of the matrix structure, and achieving a maximum flexural strength of 113.23 MPa. From our analysis, it was demonstrated that the non-equivalent displacement of Al 3+ and Mg 2+ could easily lead to the formation of the (Mg 1-x Al x/2 )Mg x/4 O solid-solution during the similar crystal structure, which enhanced mechanical strengthening between the micro-grain and framework. Meanwhile, the existence of a certain liquid phase not only effectively increased the mass transfer during the processing of interdiffusion between Al 3+ and Mg 2+ , but also promoted the distribution of crystallite and microstructure.
研究领域:
材料科学
·
陶瓷
·
高温材料
·
材料力学性能
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·Vol. 47
·期 11
·15585-15593
·
IF 4.527
Longxiang Sui,Chaofan Yin,Xiangcheng Li,Pingan Chen,Boquan Zhu
In this study, a novel phosphate-based adhesive was prepared by using homemade aluminum phosphate as a matrix and by adding different fillers simultaneously. The effects of calcination temperature and filler composition on the bonding mechanism and high-temperature bonding strength of the adhesive for high-temperature alloys were studied. The results indicated that the crystalline transformation of AlPO 4 occurred at 500 °C. AlPO 4 has two crystalline forms at 500 °C: orthorhombic and hexagonal. The addition of CuO to the fillers resulted in the exchange of Fe and Cu at the substrate interface and enhanced the high-temperature bonding strength of the specimens. The maximum tensile strength of the specimens reached 3.9 MPa at 500 °C. These composites have potential applications in aviation, aerospace, and other fields.
研究领域:
材料科学
·
胶粘剂技术
·
高温材料
·
无机非金属材料
·
航空航天工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·Vol. 49
·期 5
·8565-8575
·
IF 5.532
Chaozhong Wu,Qiang Liu,Rui Chen,Juan Wang,Wensheng Liu,Shuwei Yao,Yunzhu Ma
Maintaining high mechanical properties and thermal stability of alumina fibers is a contradictory problem. In order to solve this problem, the effects of MgO addition on the microstructure evolution and properties of alumina fibers prepared by sol-gel were studied. The addition of MgO inhibited the formation of α-Al 2 O 3 and the 2 wt% MgO addition was conducive to grain refinement, reducing the grain size from 227 nm to 162 nm and increasing the Weibull strength by 66%, up to 2.03 GPa with a peak value of 2.60 GPa. The grain growth exponent increased from 4 to 7.2 during the long-term holding at 1100 °C, indicating the better thermal stability of alumina fibers with 2 wt% MgO as well. The mechanism of MgO addition to the phase transition and grain growth of alumina fibers was further discussed.
研究领域:
材料科学
·
陶瓷
·
纳米材料
·
高温材料
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·Vol. 48
·期 16
·22967-22974
·
IF 5.532
Guang Zeng,Ping Xu,Chen Zeng,Cunqian Fang,Yafeng Wang,Xin Yang,Mingyu Zhang,Zhean Su,Qizhong Huang
A novel single-source precursor was synthesized to prepare HfC x N 1-x /SiC multiphase ceramics by using hafnium chloride (HfCl 4 ), diallylamine (DAA) and polycarbosilane (PCS). We conducted an investigation of the synthesis process, polymer-to-ceramic conversion, as well as the microstructure and phase evolution of HfC x N 1-x /SiC multiphase ceramics with different levels of SiC content. The results showed that the core-shell particles of HfC x N 1-x -carbon were embedded homogeneously in the β-SiC matrix which is beneficial for preventing grain growth and improving oxidation resistance . Based on data from oxidation tests, the ceramics improved the oxidation temperature and remained stable at a high temperature (1500 °C) with oxidation layer formation on the surface. Due to the highly cross-linked structure without oxygen, high ceramic yield, homogeneous composition and excellent oxidation resistance of the pyrolysis product, the as-prepared precursor is a promising material for making high-performance composite ceramics.
研究领域:
材料科学
·
陶瓷与复合材料
·
聚合物衍生陶瓷
·
高温材料
·
无机合成
✓ 已验证
DOI
高影响因子
Journal of Materiomics
·
2022
·Vol. 8
·期 5
·1001-1008
·
IF 8.589
Xiaoyang Wang,Chun Li,Qihan Zhou,Mingshen Li,Mushi Zheng,Junlei Qi,Xiaoqing Si,Jian Cao
One of the critical challenges for the protonic ceramic fuel cell stack is sealing electrolytes and interconnects. However, the traditional Ag CuO sealant will aggravate the oxidation along the interconnect surface and result in brittle compound layers at the BaZr 0.1 Ce 0.7 Y 0.1 Yb 0.1 O 3- δ (BZCYYb) electrolyte interface. The present work demonstrates that a silver particle interlayer with high dislocation density can be adopted to join BZCYYb electrolyte to the interconnect (AISI 441 stainless) in air instead of traditional Ag CuO sealant. Elevating temperatures result in a sufficient bonding at the Ag/BZCYYb interface, and a defect-free joint is obtained at 950 °C. Atomic bonding at Ag/BZCYYb interface is confirmed by TEM. Also, a dense and thin oxide layer (2–3 μm) is formed along the AISI 441 interface. Ag particles in the interlayer provide the main driving force for the sintering joining. The massive dislocations promote the recovery and recrystallization of the Ag interlayer, as well as the interdiffusion of BZCYYb/Ag. After aging in the wet oxidizing atmosphere at 600 °C for 300 h, joints remain intact and dense, indicating superior oxidation resistance and aging performance. Besides, the joint shear strength (25.3 MPa) is 59 % higher than that of the joint brazed by traditional Ag CuO.
研究领域:
材料科学
·
固态离子学
·
能源材料
·
电化学
·
连接技术
·
高温材料
✓ 已验证
DOI
高影响因子
MATERIALS & DESIGN
·
2016
·
IF 3.997
Shugang Chen,Yanzi Gou,Hao Wang,Ke Jian,Jun Wang
In order to prepare ZrC-ZrB 2 nanocomposite ceramics with high temperature stability from single-source precursors, the reactions of ZrCl 4 , allyl amine, allyl-MgCl and borane were employed to synthesize suitable precursors. The meliorated ZrNCB precursor had favorable solubility and higher ceramic yield (68.8 wt%), which was then transformed to ZrC-ZrB 2 ceramics at different temperatures. The main phase of the ceramics was amorphous at 1000 °C. As the temperature increased, the amorphous phases started to crystallize, resulting in the appearance of ZrC and ZrB 2 peaks. The content of ZrC and ZrB 2 phases was relatively high in the nanocomposite ceramics at 1600 °C (over 80 wt%). The ZrC-ZrB 2 nanocomposite ceramics showed good high temperature stability up to 2000 °C. Oxidation test indicated that an oxide layer was formed on the ceramic surface at 1700 °C under air to prevent further oxidation of the ceramics. With excellent high temperature and oxidation resistances , the ZrC-ZrB 2 nanocomposite ceramics have potential application for advanced rocket engines and nuclear industry.
研究领域:
材料科学
·
陶瓷
·
高温材料
·
纳米复合材料
·
航空航天工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）